Title of Invention: Battery module, battery pack comprising same, and automobile
technical field
[One]
The present invention relates to a battery module, a battery pack including the same, and a vehicle, and more particularly, to a battery module with increased safety against fire or explosion.
[2]
This application is a priority claim application for Korean Patent Application No. 10-2020-0061866 filed on May 22, 2020, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
background
[3]
In recent years, as the demand for portable electronic products such as laptops, video cameras, and mobile phones has rapidly increased and the development of electric vehicles, energy storage batteries, robots, satellites, etc. is in full swing, high-performance secondary batteries that can be repeatedly charged and discharged research is being actively conducted.
[4]
Currently commercialized secondary batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium secondary batteries. The self-discharge rate is very low and the energy density is high, attracting attention.
[5]
Such a lithium secondary battery mainly uses a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. In addition, such a lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate respectively coated with a positive electrode active material and a negative electrode active material are disposed with a separator therebetween, and an exterior material for sealing and housing the electrode assembly together with an electrolyte, that is, a battery case. .
[6]
And, depending on the shape of the exterior material, the lithium secondary battery may be classified into a can-type secondary battery in which the electrode assembly is embedded in a metal can and a pouch-type secondary battery in which the electrode assembly is embedded in a pouch of an aluminum laminate sheet.
[7]
In particular, the demand for large-capacity battery modules applied to electric vehicles and the like has recently increased.
[8]
However, since such a large-capacity battery module includes a plurality of secondary batteries, when a fire or explosion occurs in the plurality of secondary batteries, flames and high-temperature gas are discharged, and the fire is easily spread to other adjacent battery modules. As a result, the fire could spread and lead to significant property damage.
[9]
In addition, in the case of a large-capacity battery module, when a plurality of secondary batteries inside a fire or explosion occurs, other adjacent devices may be damaged or people may be injured due to the high-temperature gas and flame discharged to the outside of the battery module with such an explosion. done. Accordingly, there was a need for a method to increase the safety of the battery module against fire or gas explosion.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[10]
Accordingly, the present invention has been devised to solve the above problems, and an object of the present invention is to provide a battery module with increased safety against fire or gas explosion.
[11]
Other objects and advantages of the present invention may be understood by the following description, and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.
means of solving the problem
[12]
The battery module according to the present invention for achieving the above object,
[13]
at least one cell assembly including a plurality of secondary batteries;
[14]
a gas pipe configured to move the generated gas; and
[15]
A lower case having an open side and an internal space in which the at least one cell assembly is accommodated, and a receiving space coupled to one side of the lower case to cover the open side of the lower case and accommodating the gas pipe are provided. and a module housing having an upper case provided with a connector to which one end of the gas pipe is connected so that the gas pipe and the inner space communicate with each other.
[16]
In addition, the gas pipe,
[17]
at least one connecting unit having a pipe shape extending in the vertical direction and configured to be connected to the connector; and
[18]
A pipe unit extending long in the horizontal direction and having an end configured to be connected to the connecting unit may be provided.
[19]
Moreover, the connection unit,
[20]
An insert opening is provided so that the end of the pipe unit is inserted,
[21]
A sealing member configured to open the insertion hole when the pipe unit is inserted into the insertion hole and close the insertion hole when the pipe unit is not inserted into the insertion hole.
[22]
And, the sealing member,
[23]
Having at least two or more sealing parts located in the insertion hole,
[24]
The at least two or more sealing units are configured to be in close contact with each other to seal the insertion hole when the pipe unit is not inserted into the insertion hole,
[25]
The at least two or more sealing units, when the end of the pipe unit is inserted, between the two can be configured to open the insertion hole.
[26]
In addition, the upper case has one side of the accommodation space open,
[27]
The upper plate may further include a top plate coupled to one side of the upper case to cover an open side of the accommodating space of the upper case and provided with an outlet connected to the other end of the gas pipe to discharge gas to the outside.
[28]
Moreover, the upper case is
[29]
A first fixing groove inserted in the inner direction is provided so that one end of the connection unit in the vertical direction is inserted,
[30]
The top plate is
[31]
A second fixing groove inserted in the inner direction may be provided so that the other end of the connection unit in the vertical direction is inserted.
[32]
In addition, the gas pipe may be configured to have an adjustable length according to the gas explosive force of the at least one or more cell assemblies.
[33]
In addition, the gas pipe,
[34]
A plurality of interfering protrusions configured to prevent the gas from moving may be provided in the moving space through which the gas moves.
[35]
Moreover, the battery pack according to the present invention for achieving the above object includes at least one or more of the battery modules.
[36]
And, the vehicle according to the present invention for achieving the above object includes at least one or more of the battery pack.
Effects of the Invention
[37]
According to one aspect of the present invention, the present invention includes a gas pipe and an upper case configured to communicate with the gas pipe and the internal space, so that flames and gases generated due to fire or explosion of internal components, such as a cell assembly, are accommodated. It may be configured to move through a gas pipe disposed in the space. Accordingly, according to the present invention, the flame is not discharged to the outside directly to the battery module, and the flame can be moved only to the inside of the gas pipe. Furthermore, according to the present invention, even when gas explodes in a plurality of secondary batteries, the gas moves along the inside of the gas pipe to reduce the gas explosive force, and then the gas can be discharged to the outside.
[38]
Moreover, according to an aspect of the present invention, the present invention is provided with at least one connecting unit and a pipe unit, so that it is easy to assemble to a length set according to the gas explosive force of the gas pipe. Furthermore, according to the position at which the gas of the battery module is discharged to the outside, the extension direction of the gas pipe can be adjusted, so there is no need to manufacture a new type of gas pipe, but by assembling a plurality of existing connection units and pipe units, various shapes (length) of gas pipe can be manufactured.
Brief description of the drawing
[39]
The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so that the present invention is described in such drawings should not be construed as being limited to
[40]
1 is a perspective view schematically showing a state of a battery module according to an embodiment of the present invention.
[41]
2 is an exploded perspective view schematically illustrating the configuration of a battery module according to an embodiment of the present invention.
[42]
3 is a perspective view schematically illustrating a plurality of secondary cells of a battery module according to an embodiment of the present invention.
[43]
4 is an exploded perspective view schematically illustrating the appearance of some components of a battery module according to an embodiment of the present invention.
[44]
5 is a perspective view schematically illustrating the appearance of some components of a battery module according to an embodiment of the present invention.
[45]
6 is a perspective view schematically illustrating a part of a gas pipe of a battery module according to an embodiment of the present invention.
[46]
7 is a side view schematically showing a state of a partial configuration of a gas pipe of a battery module according to an embodiment of the present invention.
[47]
8 is a perspective view schematically illustrating a part of a gas pipe of a battery module according to an embodiment of the present invention.
[48]
9 is an exploded perspective view schematically illustrating an assembly state of some components of a battery module according to an embodiment of the present invention.
[49]
10 is a bottom perspective view schematically illustrating a state of a top plate of a battery module according to an embodiment of the present invention.
[50]
11 is a perspective view schematically illustrating the appearance of some components of a battery module according to another embodiment of the present invention.
[51]
12 is a perspective view schematically illustrating the appearance of some components of a battery module according to another embodiment of the present invention.
[52]
13 is a perspective view schematically illustrating the appearance of some components of a battery module according to another embodiment of the present invention.
[53]
14 is a cross-sectional view schematically showing an internal view of a part of a gas pipe of a battery module according to another embodiment of the present invention.
Modes for carrying out the invention
[54]
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of ​​the present invention.
[55]
Accordingly, the configuration shown in the embodiments and drawings described in the present specification is only the most preferred embodiment of the present invention and does not represent all of the technical idea of ​​the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.
[56]
[57]
1 is a perspective view schematically showing a state of a battery module according to an embodiment of the present invention. 2 is an exploded perspective view schematically illustrating the configuration of a battery module according to an embodiment of the present invention. And, FIG. 3 is a perspective view schematically illustrating a plurality of secondary cells of a battery module according to an embodiment of the present invention. The X-axis direction shown in FIG. 1 is the right direction, the Y-axis direction is the rear direction, and the Z-axis direction is the upward direction.
[58]
1 to 3 , the battery module 200 of the present invention includes a cell assembly 210 , a gas pipe 230 , and a module housing 220 .
[59]
Specifically, the cell assembly 210 may include a plurality of secondary batteries 211 . The secondary battery 211 may be a pouch-type secondary battery. For example, as shown in FIG. 3 , the cell assembly 210 may include 21 pouch-type secondary batteries 211 stacked side by side in one direction (Y-axis direction) inside the case.
[60]
Furthermore, as shown in FIG. 3 , the positive lead 211a and the negative lead 211b may be formed at ends in both directions with respect to the center of the pouch 116 of the secondary battery 211 . That is, the positive lead 211a may be provided at one end with respect to the center of the secondary battery 211 . In addition, the negative lead 211b may be provided at the other end with respect to the center of the secondary battery 211 .
[61]
However, in the battery module 200 according to the present invention, the configuration of the secondary battery is not limited to the pouch-type secondary battery 211 described above, and various types of secondary batteries 211 known at the time of the filing of the present invention are employed. can be
[62]
In addition, the battery module 200 may include at least one bus bar (not shown) configured to electrically interconnect the plurality of secondary batteries 211 . Specifically, the bus bar may include a conductive metal, for example, copper, aluminum, nickel, or the like.
[63]
4 is an exploded perspective view schematically illustrating the appearance of some components of a battery module according to an embodiment of the present invention. And, Figure 5 is a perspective view schematically showing the state of some components of the battery module 200 according to an embodiment of the present invention.
[64]
Referring to FIGS. 4 and 5 along with FIGS. 2 and 3 , the gas pipe 230 may be configured to move gas generated inside the module housing 220 . That is, the gas pipe 230 may have a tube shape extending in a direction in which the gas moves. The gas pipe 230 may be made of a metal or plastic material.
[65]
In addition, the module housing 220 may be made of a metal or plastic material. The module housing 220 may include a lower case 222 and an upper case 224 . The lower case 222 may include an internal space 222a in which the at least one cell assembly 210 is accommodated. That is, the lower case 222 may have a wall W1 forming an internal space 222a equal to or greater than the volume of the cell assembly 210 . The inner space 222a may have an open shape at one side.
[66]
Furthermore, the upper case 224 may be configured to cover an open side of the lower case 222 . That is, the upper case 224 may have a larger area than the open area of ​​the lower case 222 . For example, the upper case 224 may have a plate shape extending in a horizontal direction (X-axis direction and Y-axis direction). The upper case 224 may be coupled to one side of the lower case 222 . Here, the horizontal direction means a direction parallel to the ground when the battery module 200 is placed on the ground.
[67]
Also, the upper case 224 may include an accommodation space 224a accommodating at least a portion of the gas pipe 230 . That is, the accommodation space 224a may be a space formed by inserting a central portion of the upper case 224 downward. The accommodation space 224a may have a size to accommodate at least a portion of the gas pipe 230 .
[68]
Furthermore, the upper case 224 may include a connector H1 so that the gas pipe 230 and the inner space 222a of the lower case 222 communicate with each other. Accordingly, one end of the gas pipe 230 may be connected to the connector H1 . The gas introduced into one end of the gas pipe 230 may move horizontally along the pipe to the other end (end, 232t) of the gas pipe 230 .
[69]
Accordingly, according to this configuration of the present invention, the present invention includes an upper case 224 configured to communicate the gas pipe 230 and the inner space 222a of the lower case 222, thereby making the cell assembly 210 ), etc., may be configured such that a flame and gas generated due to a fire or explosion of internal components move through the gas pipe 230 disposed in the receiving space 224a. Accordingly, according to the present invention, the flame is not discharged directly to the outside to the battery module 200 , and the flame can be moved only to the inside of the gas pipe 230 . Furthermore, according to the present invention, even when the plurality of secondary batteries 211 gas explode, the gas moves along the inside of the gas pipe 230 to reduce the gas explosive force, and then the gas can be discharged to the outside.
[70]
In conclusion, in the present invention, compared to the case where gas and flame generated due to fire or explosion of internal components, such as the cell assembly 210, are directly discharged to the outside, the adjacent other battery module 200 or other external components It is possible to prevent the propagation of fire to the fields, and to reduce damage to adjacent external components of the battery module 200 even when a large amount of secondary batteries 211 explode.
[71]
6 is a perspective view schematically illustrating a part of a gas pipe of a battery module according to an embodiment of the present invention. 7 is a side view schematically showing a state of a partial configuration of a gas pipe of a battery module according to an embodiment of the present invention. And, FIG. 8 is a perspective view schematically illustrating a part of a gas pipe of a battery module according to an embodiment of the present invention.
[72]
Referring to FIGS. 5 to 8 together with FIG. 4 , the gas pipe 230 of the present invention may include at least one or more connection units 232 , and at least one or more pipe units 234 . Specifically, the connection unit 232 may have a pipe shape extending in the vertical direction. The connection unit 232 may have the open upper end 232a or the lower end 232b, or the upper end 232a and the lower end 232b of the pipe extending in the vertical direction sealed. The connection unit 232 may be configured to be connected to the connector H1. For example, the open lower end 232b of the connection unit 232 may be connected to the connector H1 provided in the upper case 224 . A part of the open lower end 232b of the connection unit 232 may be inserted into the connector H1. Furthermore, for example, as shown in FIG. 1 , the open upper end 232a of the connection unit 232 may be connected to the outlet H2 of the upper plate 226 . In addition, as for the remaining connection units 232 not connected to the connector H1 and the outlet H2, both the open upper end 232a and the lower end 232b may be sealed.
[73]
In addition, the pipe unit 234 may have a shape extending long in the horizontal direction. An end of the pipe unit 234 may be connected to the connection unit 232 so as to communicate with the inside of the connection unit 232 . For example, the connection unit 232 may be provided with an insertion hole (P) opened so that the end of the pipe unit 234 is inserted.
[74]
For example, as shown in FIG. 5 , the connection unit 232 may be provided with an insertion hole P at each (four sides) of the left, right, front, and rear sides. That is, the connection unit 232 may be connected to the four pipe units 234 through the four insertion holes (P).
[75]
Therefore, according to this configuration of the present invention, the present invention, by having at least one or more connection units 232 , and the pipe unit 234 , it is easy to assemble to a length set according to the gas explosive force of the gas pipe 230 . easy. Furthermore, the extension direction of the gas pipe 230 can be adjusted according to the position at which the gas of the battery module 200 is discharged to the outside, so that there is no need to manufacture a new type of gas pipe 230 , and a plurality of existing connection units By assembling the 232 and the pipe unit 234 , the gas pipe 230 of various shapes (lengths) may be manufactured.
[76]
Moreover, the connection unit 232 not only serves as a hub assembled with the pipe unit 234, but also when the upper end (232a) and/or the lower end (232b) is sealed, the explosive force of the gas introduced into the upper and lower It can play a role in reducing the explosive force by dispersing it in the direction.
[77]
In addition, the connection unit 232 may include a sealing member 240 . When the pipe unit 234 is inserted into the insertion hole P, the sealing member 240 may be configured to open the insertion hole P so that the pipe unit 234 can be inserted. For example, the sealing member 240 may include an elastic material. The elastic material may be, for example, natural rubber, synthetic rubber, or silicone rubber.
[78]
In addition, the sealing member 240 may include at least two or more sealing parts 241 and 242 positioned in the insertion hole (P). For example, the sealing member 240 may include a first sealing part 241 and a second sealing part 242 . The at least two or more sealing parts 241 and 242 may be configured to open the insertion hole P when the end of the pipe unit 234 is inserted.
[79]
For example, at least a portion of the first sealing part 241 and the second sealing part 242 may be separated. Each of the first sealing part 241 and the second sealing part 242 may be bonded to the peripheral portion of the insertion hole (P). For example, the sealing member 240 may have a circular plate shape. The outer periphery of the circular plate may be adhered to the inside of the insertion hole P of the connection unit 232 using an adhesive (eg, sealant).
[80]
Furthermore, each of the first sealing part 241 and the second sealing part 242 of the sealing member 240 may have a semicircular shape, and the first sealing part 241 and the second sealing part 242 may be connected to each other. The closely adhered central portions B may be separated from each other. For example, as shown in FIGS. 6 and 7 , the end of the pipe unit 234 passes through the separated portion between the first sealing part 241 and the second sealing part 242, so that the connection It may be inserted into the insertion hole P of the unit 232 . The sealing member 240 may serve to prevent the end of the pipe unit 234 inserted into the insertion hole P from being separated to the outside again.
[81]
In addition, the sealing member 240 may exert an elastic force to return to a circular shape in a state compressed by the inserted pipe unit 234 to press the end of the pipe unit 234 . At this time, a large frictional force is exerted between the sealing member 240 and the pipe unit 234 to prevent the pipe unit 234 from being separated to the outside of the insertion hole P.
[82]
Furthermore, the sealing member 240 is formed between the insertion hole P of the connection unit 232 and the end of the pipe unit 234 to prevent gas from leaking out between the insertion hole P of the connection unit 232 and the pipe unit. may be configured to seal between the ends of 234 .
[83]
In addition, the sealing member 240, when the pipe unit 234 is not inserted into the insertion hole (P), may be configured to seal the insertion hole (P). That is, the at least two or more sealing parts 241 and 242 may be configured to be in close contact with each other to seal the insertion hole P when the pipe unit 234 is not inserted into the insertion hole P. For example, as shown in Figure 7, the first sealing portion 241, and the second sealing portion 242 of the sealing member 240, the pipe unit 234 is inserted into the insertion hole (P) If not, the first sealing part 241 and the second sealing part 242 may be filled in the insertion hole (P).
[84]
Therefore, according to this configuration of the present invention, in the present invention, by providing the sealing member 240, the assembly process between the pipe unit 234 and the connection unit 232 can be easily performed, thereby increasing the manufacturing efficiency. can Furthermore, the gas moving into the gas pipe 230 does not leak through the gap between the connection unit 232 and the pipe unit 234 , so that the gas can be smoothly discharged.
[85]
9 is an exploded perspective view schematically illustrating an assembly state of some components of a battery module according to an embodiment of the present invention. And, Figure 10 is a bottom perspective view schematically showing the state of the top plate of the battery module according to an embodiment of the present invention.
[86]
Meanwhile, again with FIG. 4 , and referring to FIGS. 9 and 10 , the battery module 200 of the present invention may further include a top plate 226 . The upper case 224 may have a form in which one side of the accommodating space 224a is opened. The upper plate 226 may be configured to cover an open side of the accommodation space 224a of the upper case 224 . A gasket 224g may be provided in the upper case 224 between the upper plate 226 and the upper case 224 . The gasket 224g may be configured to prevent gas from leaking into a gap between the upper plate 226 and the upper case 224 .
[87]
In addition, the upper plate 226 may be coupled to one side of the upper case 224 . For example, as shown in Figures 5 and 9, a plurality of bolts (T), the third fastening groove (C3) formed in the upper plate (226), the second fastening groove (C2) formed in the upper case (224) , and after being fastened to each of the first fastening grooves C1 formed in the lower case 222 , they may be fastened using the nut N.
[88]
In addition, the upper plate 226 may be formed with an outlet (H2) to discharge the gas to the outside. The outlet H2 may have a perforated type so that the inside and outside of the module housing 220 communicate. The outlet H2 may be connected to the other end of the gas pipe 230 (end of the gas movement path, 232t in FIG. 5 ).
[89]
Therefore, according to this configuration of the present invention, the present invention is provided with the upper plate 226 configured to cover one side of the receiving space 224a of the upper case 224, so that the gas pipe 230 is the module housing 220 Not only can it be safely stored inside, but also, when a fire or explosion occurs, even if the generated gas does not move through the gas pipe 230 and leaks, it can be safely accommodated inside the accommodation space 224a. Ultimately, the safety of the battery module 200 may be improved.
[90]
In addition, referring back to FIG. 4 , the upper case 224 may include at least one first fixing groove G1 . The first fixing groove G1 may have a shape in which a portion of the upper case 224 is inserted in the inner direction of the body so that one end 232b in the vertical direction of the connection unit 232 is inserted. The first fixing groove G1 may be configured to seal one end in the vertical direction of the connection unit 232 . The first fixing groove G1 may be configured to fix the position of the connection unit 232 .
[91]
Moreover, referring again to FIG. 10 , the upper plate 226 may be provided with a second fixing groove G2 configured to insert the other end 232a in the vertical direction of the connection unit 232 . In the second fixing groove G2, a portion of the upper plate 226 may be inserted in the inner direction of the body. The second fixing groove G2 may be configured to seal the other end 232a in the vertical direction of the connection unit 232 . The second fixing groove G2 may be configured to fix the position of the connection unit 232 .
[92]
Therefore, according to this configuration of the present invention, the present invention is provided with a first fixing groove (G1) formed in the upper case (224), and a second fixing groove (G2) formed in the upper plate (226), In addition to being able to fix the position of the connection unit 232, it is possible to seal at least one of the one end 232b and the other end 232a in the vertical direction of the connection unit 232, so that the connection unit 232 ) can disperse (absorb) the pressure of the generated gas in the vertical direction, thereby reducing the explosive force of the gas.
[93]
11 is a perspective view schematically illustrating the appearance of some components of a battery module according to another embodiment of the present invention.
[94]
Referring back to FIG. 11 together with FIG. 5 , in the battery module 200A according to another embodiment of the present invention, as compared with the battery module 200 of FIG. 5 , the length of the gas movement path of the gas pipe 230A Even when are the same, the number of the connection unit 232 and the pipe unit 234 may be small. For example, in the battery module 200A according to another embodiment of the present invention, the number of connection units 232 of the gas pipe 230A may be smaller than that of the battery module 200 of FIG. 5 .
[95]
For example, in the battery module 200 of FIG. 5 , the number of connection units 232 is 24, but in the gas pipe 230A of FIG. 11 , the number of connection units 232 may be 16 . However, it can be seen that the total length of the gas pipe 230A of FIG. 11 in the horizontal direction through which the gas moves is approximately the same. The reason is that the exhaust path of each gas pipe 230A in FIGS. 5 and 11 is similar.
[96]
As such, like the battery module 200A of FIG. 11 , when compared to the battery module 200 of FIG. 5 , the battery capacity is relatively small or the gas explosive force is small, the connection unit 232 of the gas pipe 230A. can reduce the number of Also, as the number of connection units 232 is reduced, the number of pipe units 234 may be reduced. The pipe unit 234 may be connected to the connection unit 232 in an extended state.
[97]
Therefore, according to this configuration of the present invention, in the present invention, the number of connection units 232 and pipe units 234 of the gas pipe 230A can be adjusted according to the gas explosive force of the at least one cell assembly 210 . By configuring so as to reduce unnecessary parts, it is possible to reduce the weight of the battery module and reduce the manufacturing cost.
[98]
In addition, referring back to FIGS. 6 and 8 , the gas pipe 230 may be configured to have an adjustable length according to the gas explosive force of the at least one or more cell assemblies 210 . Specifically, the pipe unit 234 may be configured to be adjustable in length.
[99]
For example, referring to FIG. 8 , the pipe unit 234 may include three pipe parts 234a, 234b, and 234c. The diameter of the pipe part 234a located on the left side and the pipe part 234c located on the right side in FIG. 8 may be the same. The remaining pipe part 234b located in the center may have a smaller diameter than the two pipe parts 234a and 234c. The centrally located pipe part 234b may be configured such that a part and the other part can be inserted into the left pipe part 234a and the right pipe part 234c, respectively.
[100]
Accordingly, the present invention increases the length of the pipe unit 234 by withdrawing the pipe part 234b located in the center from the inside of the left pipe part 234a and the right pipe part 234c, if necessary, Alternatively, the entire length of the pipe unit 234 may be reduced by inserting the centrally located pipe portion 234b into each of the left pipe portion 234a and the right pipe portion 234c.
[101]
Therefore, according to this configuration of the present invention, in the present invention, the gas pipe 230 is configured to be adjustable in length according to the gas explosive force of the at least one or more cell assemblies 210 , so that the battery module 200 is The length and position of the gas pipe 230 may be changed to suit the explosive force or the gas exhaust path.
[102]
That is, the length and position of the gas pipe 230 may be changed according to the size and shape of the battery module 200 , so that the gas pipe 230 may be used as a standardized component. Accordingly, even when the battery module 200 is changed in various capacities or shapes, it is not necessary to separately manufacture the gas pipe 230 , thereby reducing manufacturing costs.
[103]
12 is a perspective view schematically illustrating the appearance of some components of a battery module according to another embodiment of the present invention.
[104]
Referring to FIG. 12 together with FIG. 1 , the battery module 200B of FIG. 12 has an outlet (not shown) formed in the upper plate 226 when compared to the gas pipe 230A of the battery module 200A of FIG. 11 . The position of the distal end 232t of the gas pipe 230B connected to may be different. For example, as shown in FIG. 12 , the distal end 232t of the gas pipe 230B may be configured to be connected to an outlet (not shown) located on the rear left side of the upper plate 226 . In addition, the gas pipe 230B of FIG. 12 may be configured such that a forward-backward movement path among gas movement paths becomes longer.
[105]
13 is a perspective view schematically illustrating the appearance of some components of a battery module according to another embodiment of the present invention.
[106]
Referring to FIG. 13 together with FIG. 1 , the battery module 200C of FIG. 13 has an outlet (not shown) formed in the upper plate 226 when compared with the gas pipe 230A of the battery module 200A of FIG. 11 . The position of the distal end 232t of the gas pipe 230C connected to may be different. For example, as shown in FIG. 13 , the distal end 232t of the gas pipe 230 may be configured to be connected to an outlet (not shown) located on the front right side of the upper plate 226 . Also, the gas pipe 230C of FIG. 13 may be configured such that a left-right movement path among gas movement paths becomes longer.
[107]
14 is a cross-sectional view schematically showing an internal view of a part of a gas pipe of a battery module according to another embodiment of the present invention.
[108]
Referring to FIG. 14 , the pipe unit 234D of the gas pipe 230D of the battery module 200 according to another embodiment of the present invention may be provided with a plurality of interference protrusions K therein. The plurality of interference protrusions K may be configured to prevent gas from moving in a moving space in which the gas moves. The plurality of interference protrusions K may extend from the inner surface of the pipe unit 234D to be inclined in a direction opposite to the moving direction G of the gas. The plurality of interference protrusions K may be configured to cause friction with the moving gas to lower the gas moving speed.
[109]
Therefore, according to this configuration of the present invention, the present invention reduces the speed of gas movement by forming a plurality of interference protrusions K inside the gas pipe 230D, and then to the outside through the gas pipe 230D. It is possible to effectively reduce the explosive power of the emitted gas. Accordingly, it is possible to effectively increase the safety of the battery module.
[110]
Meanwhile, the battery pack according to an embodiment of the present invention includes at least one or more of the battery modules 200 .
[111]
In addition, the battery pack may further include various devices (not shown) for controlling the charging and discharging of the battery module 200 , for example, a battery management system (BMS), a current sensor, a fuse, and the like.
[112]
Meanwhile, an electronic device (not shown) according to an embodiment of the present invention includes at least one or more of the above-described battery modules 200 . The electronic device may further include a device housing (not shown) having a storage space for accommodating the battery pack and a display unit through which the user can check the charging state of the battery pack.
[113]
Also, the vehicle according to an embodiment of the present invention may include at least one battery pack. The vehicle may be a vehicle such as an electric vehicle or a hybrid vehicle. That is, in the vehicle according to the embodiment of the present invention, the battery pack according to the embodiment of the present invention described above may be mounted inside the vehicle body.
[114]
Meanwhile, in this specification, terms indicating directions such as up, down, left, right, front, and back are used, but these terms are for convenience of explanation only, and may vary depending on the position of the object or the position of the observer. It will be apparent to those skilled in the art that the present invention can.
[115]
[116]
As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of ​​the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.
[117]
[Explanation of code]
[118]
200: battery module 210: cell assembly
[119]
211: secondary battery 220: module housing
[120]
222: lower case 224: upper case
[121]
226: top plate 222a, 224a: interior space, accommodation space
[122]
H1, H2: connector, outlet
[123]
230: gas pipe
[124]
232: connection unit 234: pipe unit
[125]
P: insert
[126]
240: sealing members 241, 242: first sealing portion, second sealing portion
[127]
G1, G2: first fixing groove, second fixing groove
[128]
K: interference projection
Claims
[Claim 1]
at least one cell assembly including a plurality of secondary batteries; a gas pipe configured to move the generated gas; and a lower case having an open side and an inner space in which the at least one cell assembly is accommodated, and a receiving space coupled to one side of the lower case to cover the open side of the lower case and accommodating the gas pipe. and a module housing having an upper case provided with a connector to which one end of the gas pipe is connected so that the gas pipe and the inner space communicate with each other.
[Claim 2]
According to claim 1, wherein the gas pipe, at least one or more connection units having a pipe shape extending in the vertical direction and configured to be connected to the connector; and a pipe unit extending long in the horizontal direction and configured to have an end connected to the connecting unit.
[Claim 3]
The method of claim 2, wherein the connection unit is provided with an insertion hole through which an end of the pipe unit is inserted, and when the pipe unit is inserted into the insertion hole, the insertion hole is opened, and the pipe unit is inserted into the insertion hole. When not inserted, the battery module, characterized in that provided with a sealing member configured to seal the insertion hole.
[Claim 4]
The method according to claim 3, wherein the sealing member includes at least two or more sealing parts located in the insertion hole, and the at least two or more sealing units are in close contact with each other to close the insertion hole when the pipe unit is not inserted into the insertion hole. The at least two sealing units are configured to be sealed, and when the end of the pipe unit is inserted, the battery module is configured to open the insertion hole by being spaced apart between the two.
[Claim 5]
The gas pipe according to claim 2, wherein the upper case has one side of the accommodating space open, and is coupled to one side of the upper case to cover the open side of the accommodating space of the upper case, and discharges gas to the outside. Battery module, characterized in that it further comprises a top plate provided with an outlet connected to the other end of the.
[Claim 6]
The method of claim 5, wherein the upper case is provided with a first fixing groove which is inserted in the inner direction so that one end in the vertical direction of the connection unit is inserted, and the upper plate, the other end in the vertical direction of the connection unit is inserted A battery module, characterized in that provided with a second fixing groove inserted in the inner direction as possible.
[Claim 7]
The battery module according to claim 2, wherein the gas pipe is configured to have an adjustable length according to a gas explosive force of the at least one or more cell assemblies.
[Claim 8]
The battery module according to claim 7, wherein the gas pipe is provided with a plurality of interference protrusions configured to prevent gas from moving in a moving space in which the gas moves.
[Claim 9]
A battery pack comprising at least one battery module according to any one of claims 1 to 8.
[Claim 10]
10. A vehicle according to claim 9, comprising at least one battery pack.